Connecter for electric conductors



w. c. sTEvl-:Ns

CONNECTER FOR ELECTRIC CONDUGTORS July 9,1935.

Original Filed Sept. 10, 1926 'Amm ATTORNEY Patented July 9, 19375Y Renewed June ,10,k 19432 i' '15 claims.(Cline-eer) f] 1 i substantially :flush "with said shoulder lila,` yand '."This invention relatestolimprovements in c'n-v nectersior electric vconductors and more particularly to improvements inplug caps for'separable attachmentplugs.

An object 'ci the inventioiiis to provide a Vplug :cap of simple and relatively inexpensive. construction, which is nevertheless capable of Withstanding more rough `usage than such devices Aas lheretofore constructed. "i

10 Another object is to provide a plug cap wherein the amount of insulating material isreduced to a minimum While providing lincreased protection for the current carrying elements. a i

` Anothei` object is to provide an improved and l15 `simplii-leol mounting rfor the-plug contacts and terminals."V .1' f

-Another object is to l provide novel means for *securing the'fseveral elements in assembled relaition. N

20 rOther objects and' advantages ofthe invention will hereinafter appear. .i i V v LInthe accompanying. drawingv Iflhave illustrated'f certain embodiments of my invention which willnovv be described, it `being understood 25 Nthat vvarious changesV in the detailsof construc- 4tion thereof may beV 'made without `departing `from' the spirit and scope'of myinvention aszde- {rie'd'in theappended claims. In .the drawing, 1 l1 "30 Figure 1 is an` enlarged vertical sectionalview y of a plug cap constructed'in'accordance Withumy invention; n 1 1 1 l Fig. 2 is a bottom plan view ofthe capillus- `tratedin Fig'. 1. A. E f i -35 l Fig. 3 is afpianview of the baseer disk no which the plug 'contacts are secured;` Y 1 y l- Fig. 4 is a vertical sectional view of a'modied form of plug'capg. 1 Y i. 'f Fig.'A 5 isI a'vertical sectional view ofia modied Alform of the-plug cap l.illustrated in Fig. 4'; fand Fig". 6 is afverticalfsectionalivievvcf thegin- "sulating lini lg :employed in the caps:.,illustrat`ed red Figs. fiand 5.

'Referring 'insito .une` device illustrated inV rigs.,

45 f 1` to A3of the Vdrawingrthe numeral I0 designates fa ymetallic shell or'casing adapted to receive and retain the insulating'and current carrying 'ele- '.me'ntsof tle'plug cap'. One. end of ,lshellgl 'is 510 thelead-in Wires or "conductorsvand theopposite end of said shell is provided with anenlarged annular `rim portion I2, forming Aan annular 55 QA 'thin cup-shaped insulatinglining `I3` rests Within shell I0, said`lining extendingto aipoint being provided lwith a 'central opening-I4 registering withopening il. Said lining suitably ino sulates the inner surface of the metal shell. y

.A circular yplate orgdisk I of insulating material, such asf acanvas-'reinforcedsynthetic resin composition, is adapted to-gseat upon shoulder I2a andagainst` the loweredge-of lining I3, `vsaid dislgibeing adapted ,tosupport-centact jacks Iii, as hereinafter .more fully described. A circular insulating collar or ring Il is interposed between :disk ISYiandtheouter end of rim l2. In practice collar I1 may be formed .from a flat strip of brous insulating material ofthe required length to provide .av split. ring of the desired size. After inserting lining I3, disk I 5 and collar Il into shell I0,"the outer-'edge (indicated in vdotted lines at 1 I8)f'of rim I2 is spun or bentover as indicated at I9. By the means aioredescribed the interior surface ofwshell II) isisufciently covered with inv `sulating material .to protect all Vcurrent .carrying lparts of the-'cap from'enga'gement with the shell.

1 Contacts I6' arer of usual'construction,V and are provided Withterminal lugs: or basefportions 20. These vlugs are provided with 'l circular openings .adapted-to registerwWith/openings 2I and'22 in'v ldisk I5. @Suitable eyelets or rivetsi23 provide for' yrigidly securing 'lugs12ll to base I5. 1 Openings 22 provide clearance for the conductor securing terminal screws 24. Base I5 is provided with asuitable openingl'jor vperforation to permit passage of the conductors or Wire terminals therethrough; -Whereas if desiredany suitable form of strain V-relief v(notshoWn) maybe located Within-the plug cap.l The contactsI 5 are also provided with employed, the numeral VSil designates a -metallic v'shell offaform slightly-diierent4 from that ilusztrated inflig. .1. -In this forma relatively thick insulating liningmil isadapted to t into vthe .hemispherical end porti0n;,.of, the shell. 't prvidedfvvith an 'opening II to permit passageof Disk I51is `adapted to resti-upon theoutel end portion 132 of ,this lining. AAfring `33 ,of insulation,` similar totfiat shovvnlat` I1 in Figi, likewise seats against diskl l5.` ,."ElangeSll` (indicated in dotted4 lines) l is1 thereupon-spun or.; pressed down as shown at "35: to, rigidly secure the ,'elementsof the plug .@c'ap in their` respective positions. The cap illustrated in Fig. 5 is similar to that of Fig. 4, except that the shell 36 is provided with an annular bead or corrugation 31 to facilitate manipulation of the plug cap. Shells 30 and 36 are provided with circular openings I I as described in connection with Fig. 1, through which the conductors enter the cap. Lining 3| (Figs. 4, 5 and 6) is also provided with a registering opening 38 for a like purpose. f

The insulating lining portions of the cap are preferably formed of a suitable tough, fibrous maY teria1,whereas the contact supporting disk is alsoAV formed of a tough or reinforced form of insulation. Moreover, in practice vthe lining' I3 shown in Fig. 1 may consist of paper or other inexpen-y sive brous material. It Willrthus be apparen that plug caps of the character herein described are not liable to break when dropped or otherwise roughly handled. Similarly, the various parts may be readily assembled to provide a strong and serviceable plug cap. Y

What I claim and desire to 'secure by Letters Patent is:v A

1. In an attachment plug, the combination with a one-piece metallic shell, of a lining therefor composed of. separate insulating sections, a perforated insulating disk orplateinterposedbetween said sections, contact members rigidly secured to said disk, and means for securing said shell, lining and disk in assembled relationship to each other.

-2. In an attachment plug, the combination with a one-piece metallic shell, of a lining therefor composed of separate insulating sections, a. perforated insulating disk or plate interposed between said sections, contact members rigidly secured to said disk, and means on said shell for securing said disk and said sections 'in asembled relation. Y

3. An attachment plug cap comprisingV a onepiece metallic shell, a sectional lining therefor, said lining comprising tough fibrous insulating material, a perforated base of insulating material interposed between the lining sections, a plurality of combined contact blade and wiringierminal members carried by saidbase, and commonmeans for securing the several parts in assembled relation, the wiring terminal portions of said members being accessible for'wlr'ingv Vafter' complete assembly of the cap parts.

4. An attachment plug cap comprising a onepiece metallic cap body, a sheet insulation lining for said body secured Withinv the. latter, a relatively thin but relatively rigid member of .sheet insulation arranged within said'cap body in a plane spaced upwardly from' the lower edge thereof and engaged on oposite faces thereof by said lining for support by the latter, and contact blades rigidly secured to said relatively rigid member.

5. An attachment plug cap comprising a metallic cap body, a sheet insulation lining for `said body secured within the latter, a relatively thin but relatively rigid member of sheet insulation arranged Within said cap body and engaged with said lining for support by the latter, said member having an opening formed therein-to provide 'a cord passage, and combined wiring terminal and contact blade members rigidly secured .to the outer face of said-relatively rigid member, said wiring terminals being exposed and readily accessible in the assembled relation oi said 6. In an attachment plug cap, the combination with a one-piece metallic shell ofsubstantially cup-shape, an annular shoulderintermedite'th@ ends of said shell, an insulating member resting within said shell and having its outer edge substantially flush with said shoulder, an insulating disk adapted to seat against said shoulder, an insulating ring adapted to engage the opposite side of said disk to hold the latter in position and means for retaining said ring in assembled relation to said shell.

7. In an attachment plug cap, the combination rwith a one-piece metallic shell of substantially cup-shape, an annular shoulder intermediate the Vends of Ysaid shell, an insulating member resting Within saidY shell and having its outer edge substantially flush with said shoulder, an insulating disk adaptedy to seat against said shoulder, an insulating ring adapted to engage the opposite side of said disk to hold the latter in position, and an annular inturned flange on said shell adapted to engage said ring.

8. In an attachment plug cap, the combination with a one-piece metallic shell of substantially cup-shape, an annular shoulder intermediate the ends of said shell, an insulating member resting within said shell and having its outer edge substantially flush with said shoulder, an insulating disk adapted to seat against said shoulder, said shell, insulating member and disk'having registering openings to permit passage of connecting wires, and a relatively thick insulating ring interposed between said disk and the outer end of said shell, the latter having an inturned annular flange engaging said ring to hold the parts in assembled relation.

9. An attachment plug cap comprising a onepiece metallic shell, a lining therefor comprising a plurality of sections of sheet insulation,a relatively thinY but relatively rigid member of .sheet insulation engaged with and supported by said insulating lining said member having an opening formed therein to provide a. cord passage, and a plurality oi' one-piece combined contact blade and terminal members secured to said relatively rigid member of sheet insulation and exposed on the outer face of the latter.

10. An attachment plug'cap comprising a metallic cap body, aV sheet insulation lining for said body secured within the latter, a relatively thin but relatively rigid member of sheet insulation arranged within said cap and engaged with said lining for support by the latter, said cap body, sheet'insulation lining and relatively rigid member each having an opening and said openings being Valined to provide acord passage, and onepiece combined wiring terminal and contact blade members carried by said relatively rigid' member, the wiring terminal portions of said members being exposed and readily accessible in the assembled relation of said parts.

Y1i. An attachment plug cap comprising a cupl shaped cap having interior walls formed of sheet insulation, a relatively rigid part of sheet insulation spanning the interior of said cap and engaged with the insulation walls of the latter for support thereby in a iixed position, contact blades fixed to said relatively rigid part and having wiring terminals on the exposed face of the latter, said cap having an annular wall projecting beyond said relatively rigid part and said wiring terminals to seat endwise against a complementary plug part, and said plug cap being formed to provide a passage for wires to be attached to said terminals.

l2. An attachment plug cap comprising a cupshaped cap having outer walls formed of sheet metal and inner walls formed of sheet insulaa relatively rigid part'o'f sheet insulation with an opening therethroughspanning the interior of said cap andrengaged with the walls of the latter `for support thereby in a xed position, `and contact blades ired to said relatively rigid part and having Wiring terminals on the ex.-

posed faceof thelatter, said cap having an annular wall projecting beyond said. relatively rigid part and said Wiring'. terminals to seat endwise against a complementary plug part.

13..,An attachment plug cap comprising a cupshaped cap having interior walls of insulation, an insulating base spanning the interior of said cap and engaged with the insulation walls of the latter lfor support thereby in a xed position, said base consistingof a iiat substantially circu lar disk of relatively ,thin but relatively rigid sheet insulation, said diskhaving a central perforation providing a cord passage, aV plurality of Y one-pieceI combined contact vand wiring` terminal members positioned on one face of said disk with the `Contact portions extending `in parallel relation at substantially right angles to said face of the disk, rivets penetrating said disk and members at points adjacent to the Contact portions thereof respectively to secure said members to said disk, binding screws carried by said onepiece members at points spaced; from said rivets, said disk having other perforation's'to accommodate the shanksof said binding screws, vand said cap having an annular Vwall projecting beyondA said disk and said wiring terminals to seat against a complementary plug part.

14. AAn attachment plug cap comprising a sub- 2,067,352 tion, thelatterbeing secured Within the former,

with the Contact portions extending in parallel,

relation'at substantially right angles to said face of the disk, rivets penetrating said disk and said members respectively to secure the latter to the former binding screws carried by said members,

Vandsaid disk having other perforations to accommodate the shanks of saidbinding screws.

15. An attachment plug cap comprising a onepiece Vcup-shaped metallic shell having a cord opening therein,` a lining of sheet insulation adapted to cover substantially the entire inner surface of said shell, a plurality of contact blades,

means for supporting Ysaidv blades within the` shell with portions of said blades projecting from f the shell, said means comprising a relatively thin .but relatively rigid disk of sheetinsulation to which said *blades are secured, said disk having a cord opening registering with the opening first mentioned, and common means for securing said Y relatively rigid disk to said lining for support thereby and for securing the latter withinsaid shell. l WILLIAM C. STEVENS. 

